help me out regarding web request...

Hello All,
I am a beginner in asp.net..may be my question seems to be silly to you all, but pls help me out...

i have a web application which basically redirects the page to another web application and the url of the first web application has to captured in the second one...
the concept of using request.query string is ruled out...

i tried using the hiddenvariable in the first app.., but somehow its not working..